Factor each expression below.
a. 16x − 4 =
b. −10x 5x2 =
c. 30y − 24x =

What is the absolute value of the complex number -4-sqrt2i

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36

Math i have no idea how to do a and b